noun
block of sake lees
Refers to sake lees (酒かす) pressed into a solid block, used in cooking and pickling.
See also: 酒かす
板かすを水で溶いて味噌汁に入れる。
Dissolve a block of sake lees in water and add it to miso soup.
この漬物は板かすで漬けてある。
These pickles are made using a block of sake lees.
酒かす is the general term for sake lees, while 板かす specifically refers to the lees pressed into a solid block.
Compound of 板 (ita, 'board, block') and かす (kasu, 'lees, dregs'), referring to sake lees formed into a flat block.